1.

Sn=4n-n×n.Find AP

Answer» Put the value on Sn that n=1 as a first term. Then put n=2 as a second term.
putting value n=1 This is a first term Putting value n=2This is a second term Show ap 3 4 ....
n=1 , 4(1)-(1)*(1) = 3. n=2. , 4(2)-(2)*(2) = 4. n=3. , 4(3)-(3)*(3) = 3


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